Variation of youngs modulus with temperature

[Himal kharel]

Does youngs modulus of elasticity depend upon temperature?

 

[edgepflow]

Yes, see this link:

http://www.engineeringtoolbox.com/young-modulus-d_773.html

 

[Himal kharel]

But why??

 

[Mapes]

But why??

Roughly, the force holding atoms together in bonds decreases as the bond length increases, which happens during thermal expansion. This force is the origin of the macro-scale elastic modulus.

 

[sardar]

The Young's modulus of elasticity is defined as the measure of a material's stiffness or resistance to deformation under an applied force. It is a fundamental property of a material and is dependent on various factors, including temperature.

As the temperature of a material increases, its atomic and molecular structure may change, leading to changes in its mechanical properties such as Young's modulus. This is because temperature affects the movement and arrangement of atoms and molecules within a material, which in turn affects its ability to withstand stress.

For most materials, an increase in temperature results in a decrease in Young's modulus, meaning that the material becomes less stiff and more flexible. This is due to the increased thermal energy causing the atoms and molecules to vibrate more, making it easier for them to move and deform under an applied force.

However, there are some materials, such as rubber, that exhibit the opposite behavior, where an increase in temperature leads to an increase in Young's modulus. This is because the increased thermal energy causes the polymer chains in rubber to straighten out, making it stiffer and less flexible.

In summary, the Young's modulus of elasticity does depend on temperature, as the thermal energy affects the material's structure and its ability to resist deformation. It is important for scientists and engineers to consider this variation in Young's modulus with temperature when designing and using materials in different temperature environments.